Method and apparatus for selectively detecting motion vectors of a wavelet transformed video signal
US6219383A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1998 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Jun 8, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for motion estimating between a current and a previous frames in a video signal derives a wavelet representation of the current and previous frames to thereby generate M layers and storing a current subimage of a lowest frequency band for each layer of each frame, wherein each layer has a corresponding resolution and M is a positive integer. A motion vector of each search block in a current subimage of a lowest frequency band in an Mth layer is detected with respect to a corresponding previous subimage based on motion vectors of neighboring search blocks and a motion vector of each search block in a current subimage of a lowest frequency band in an (M-i)th layer is detected with respect to a corresponding previous subimage based on motion vectors of neighboring search blocks and a scaled motion vector of a corresponding search block in the current subimage of the lowest frequency band in the (M-i+1)st layer, wherein i is an integer ranging from 1 to M-1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.